#include"stdio.h"
main()
{
	double x,y;
	char op;
printf("Type an expression:");
scanf("%lf%c%lf",&x,&op,&y);
if(op=='+')
printf("=%.2f\n",x+y);
else if(op=='-')
printf("=%.2f\n",x-y);
else if(op=='*')
printf("=%.2lf\n",x*y);
else if(op=='/')
printf("=%.2lf\n",x/y);
else
printf("Unknow\n");
return 0;
}